Tag
8 posts
file size
Everything filed under file size.
Does Cropping Shrink a Photo?
A 16px trim grew 7 of 7 JPEGs at q95 (median 1.5036x). Cropping is a re-encode; the scissors do not set the bytes.
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If I resize a photo to 50%, is the file half the size?
50% of each side is 25% of the pixels. 17 photos landed at a median 25.4% of original bytes, not 50%.
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Should you convert a screenshot to JPEG?
A photo as PNG was 2,285,876 bytes; JPEG quality 85 made 320,385. A spreadsheet UI screenshot went from 68,660 PNG to 117,944 JPEG. Convert photos, not flat UI.
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Why is my PDF over 5MB?
A 6-page photo packet printed to PDF was 6,447,273 bytes. Re-encoding the pictures at the same 1870x2420 grid landed at 4,279,341, under the 5,000,000-byte portal cap.
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Does 300 DPI make a bigger file than 72 DPI?
Same 1200×1800 JPEG at 72 DPI and 300 DPI: both 103,977 bytes. A 4×6 at 300 DPI is 17× the pixels of 72 DPI. DPI is a print label, not a file-size knob.
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I compressed 9 images to 100 KB. Here's what survived.
A 1,609,228-byte food photo shrank to 1749×1749 at JPEG quality 20 to hit 99,927 bytes. Seven photos all landed at quality 20–25. 100 KB is 102,400 bytes.
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Why is my PNG so large?
A 2400×1600 photo saved as PNG was 3,412,334 bytes. Same pixels as JPEG quality 80: 458,627. PNG is lossless. Photos pay for that.
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Why is my PDF over 1MB?
A one-page text CV is 1,080 bytes. This page’s own 16:9 PNG is 1.19MB. Forms cap PDFs at 1MB because the photo inside is the file.
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